Die Cutting 3M White VHB Acrylic Adhesive Tape 3M4920

• High strength
• Improve productivity
• Enhance product aesthetics

Product Description:

3M™ VHB™ Tapes provide the convenience and simplicity of a tape fastener and are ideal for use in many interior and exterior bonding applications. In many situations, they can replace rivets, spot welds, liquid adhesives and other permanent fasteners.
These 3M™ VHB™ Tapes are made with acrylic foam which is viscoelastic in nature. This gives the foam energy absorbing and stress relaxing properties which provides these tapes with their unique characteristics. The acrylic chemistry provides outstanding durability performance.
These tapes utilize a variety of specific foam, adhesive, color and release liner types to provide each product/family with specific features.
These features can include adhesion to specific or a broad range of materials, conformability, high tensile strength, high shear and peel adhesion, resistance to plasticizer migration, and UL746C recognition. All 3M™ VHB™ Tapes have excellent durability and excellent solvent and moisture resistance.
The tapes included in this data page have unique performance features that are not typically required in most common applications.
Please refer to “3M™ VHB™ Tapes” technical data sheet for applications that do not require the special features incorporated in these specialty tapes.

3M™ VHB™ Tape Products

4950 Family
This family has general purpose adhesive on both sides of firm type foam. This family is typically used on metal, glass and high surface energy plastic substrates. Available in white and black.
Tape Number     Color                             Thickness in (mm)
4914                    White                                 0.010 (0.25)
4920                    White                                 0.015 (0.4)
4929                    Black                                 0.025 (0.6)
4930(F)               White                                 0.025 (0.6)
4949                    Black                                 0.045 (1.1)
4950                    White                                 0.045 (1.1)
4955                    White                                 0.080 (2.0)
4959(F)               White                                 0.120 (3.0)

4945 Family
This family has multi-purpose adhesive on both sides of firm foam.

Tape Number                           Color                     Thickness in (mm)
4945                                          White                      0.045 (1.1)
4946                                          White                      0.045 (1.1)

4910 Family
This family of clear tapes is excellent for applications where clear or colorless is desired. The general purpose adhesive on both sides is suitable for high surface energy substrates.
Tape Number                                    Color                             Thickness in (mm)
4905                                                    Clear                               0.020 (0.5)
4910                                                    Clear                               0.040 (1.0)

4951 Family
This family of tapes is based around the low temperature appliable acrylic adhesive system, utilized on both firm and conformable foam types. These products are suitable for high surface energy substrates. Available in white (firm foam) and gray (conformable foam).
Tape Number                                     Color                           Thickness in (mm)
4951                                                    White                            0.045 (1.1)
4943F                                                  Gray                             0.045 (1.1)
4957F                                                  Gray                             0.062 (1.6)

4611 Family
This family has a general purpose adhesive on both sides of firm foam. This family of tapes is typically used on metal substrates, and has the added feature of high temperature resistance, making it often suitable for bonding prior to high temperature paint processing.
Tape Number                                      Color                           Thickness in (mm)
4611                                                      Dark Gray                     0.045 (1.1)
4646                                                      Dark Gray                     0.025 (0.6)
4655                                                      Dark Gray                     0.062 (1.6)

4622 Family
This family has general purpose adhesive on the face side (the side that typically would be bonded first) and multi-purpose adhesive on the liner side (the side exposed when the release liner is removed) of a conformable foam. Available in white.
Tape Number                                      Color                           Thickness in (mm)
4618                                                     White                             0.025 (0.6)
4622                                                     White                             0.045 (1.1)
4624                                                     White                             0.062 (1.6)

Use the right tape thickness: The necessary thickness of tape depends on the rigidity of substrates and their flatness irregularity. While the 3M™ VHB™ Tapes will conform to a certain amount of irregularity, they will not flow to fill gaps between the materials. For bonding rigid materials with normal flatness, consider use of tapes with thickness of 45 mils (1.1 mm) or greater. As the substrate flexibility increases thinner tapes can be considered.
Use the right amount of tape: Because 3M™ VHB™ Tapes are viscoelastic by nature their strength and stiffness is a function of the rate at which they are stressed. They behave stronger with relatively faster rate of stress load (dynamic stresses) and will tend to show creep behavior with stress load acting over a long period of time (static stresses). As a general rule, for static loads, approximately four square inches of tape should be used for each pound (57 cm2 of tape per kg) of weight to be supported in order to prevent excessive creep. For dynamic loads, the dynamic performance characteristics provided on page 4 should be useful, factoring in the appropriate safety factors.
Allow for thermal expansion/contraction: 3M™ VHB™ Tapes can perform well in applications where two bonded surfaces may expand and contract differentially. Assuming good adhesion to the substrates, the tapes can typically tolerate differential movement in the shear plane up to 3 times their thickness.
Bond Flexibility: While an advantage for many applications where allowing differential movement is a benefit, the tape bonds
are typically more flexible than alternative bonding methods. Suitable design modifications or periodic use of rigid fasteners or
adhesives may be needed if additional stiffness is required.
Severe Cold Temperature: Applications which require performance at severe cold temperatures must be thoroughly evaluated by the user if the intended use will subject the tape product to high impact stresses. A technical bulletin “3M™ VHB™ Tape Cold Temperature Performance” (70-0707-3991-0) is available for additional information.

Application Techniques:
Clean: Most substrates are best prepared by cleaning with a 50:50 mixture of isopropyl alcohol (IPA*) and water prior to applying 3M™ VHB™ Tapes.
Exceptions to the general procedure that may require additional surface preparation include:
• Heavy Oils: A degreaser or solvent-based cleaner may be required to remove heavy oil or grease from a surface andshould be followed by cleaning with IPA/water.
• Abrasion: Abrading a surface, followed by cleaning with IPA/water, can remove heavy dirt or oxidation and canincrease surface area to improve adhesion. Abrasion is not suggested with 3M™ VHB™ Tapes 4932 and 4952.
• Adhesion Promoters: Priming a surface can significantly improve initial and ultimate adhesion to many materialssuch as plastics and paints.
• Porous surfaces: Most porous and fibered materials such as wood, particleboard, concrete, etc. need to be sealed to provide a unified surface.
• Unique Materials: Special surface preparation may be needed for glass and glass-like materials, copper and copper containing metals, and plastics or rubber that contain components that migrate (e.g. plasticizers).
Refer to 3M Technical Bulletin “Surface Preparation for 3M™ VHB™ Tape Applications” for additional details and suggestions. 

Technical Information:

The technical information, recommendations and other statements contained in this document are based upon tests or experience that 3M believes are reliable, but the accuracy or completeness of such information is not guaranteed.

Product Use:

Many factors beyond 3M’s control and uniquely within user’s knowledge and control can affect the use and performance of a 3M product in a particular application. Given the variety of factors that can affect the use and performance of a 3M product, user is solely responsible for evaluating the 3M product and determining whether it is fit for a particular purpose and suitable for user’s method of application.

 Other Products

Acrylic(VHB) Tape                                    3M 9495LE

Masking Tape                                           3M 467MP

Die Cutting

Certifications

Each roll packed with Poly bag / Blister card / Double blister in standard export cartons.